EP 0183797 B1 19890719 - 5-HALO-4H-1,3-DIOXIN-4-ONE COMPOUNDS, PROCESS FOR THEIR PREPARATION AND THEIR USE IN THE PREPARATION OF ALPHA-HALO-ACETOACETIC ESTERS
Title (en)
5-HALO-4H-1,3-DIOXIN-4-ONE COMPOUNDS, PROCESS FOR THEIR PREPARATION AND THEIR USE IN THE PREPARATION OF ALPHA-HALO-ACETOACETIC ESTERS
Publication
Application
Priority
- US 61944984 A 19840611
- US 61945084 A 19840611
Abstract (en)
[origin: WO8600068A1] 5-halo-4H-1,3-dioxin-4-ones and their preparation by treating a compound having formula (I), with X2 or SO2X2 wherein X is Cl or Br. The 5-halo-4H-1,3-dioxin-4-ones can then be reacted with an alkali metal alkoxide at a temperature of about -40<o>C. to about 50<o>C. to provide an alpha -haloaceto-acetic ester.
IPC 1-7
IPC 8 full level
C07C 205/43 (2006.01); C07D 319/06 (2006.01)
CPC (source: EP)
C07C 205/43 (2013.01); C07D 319/06 (2013.01)
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
WO 8600068 A1 19860103; CA 1234125 A 19880315; DE 3571616 D1 19890824; EP 0183797 A1 19860611; EP 0183797 B1 19890719
DOCDB simple family (application)
US 8500987 W 19850530; CA 482152 A 19850523; DE 3571616 T 19850530; EP 85902887 A 19850530